Pet feeder

ABSTRACT

Methods and apparatus are provided for feeding a pet in a manner that engages the pet and provides stimulation and exercise. Exemplary apparatus for dispensing animal food include a food hopper for containing animal food operatively connected to a food handler that launches a portion or ration of the animal food away from the unit in response to detecting a triggering action of the animal.

RELATED APPLICATION

This application is a divisional of and claims priority to, and anyother benefit of, U.S. Non-Provisional patent application Ser. No.12/432,580, filed Apr. 29, 2009, and entitled “PET FEEDER”, which claimspriority to, and any other benefit of, U.S. Provisional PatentApplication No. 61/048/776, filed Apr. 29, 2008 and entitled “PLAYTIMEPET FEEDER,” both of which are herein incorporated by reference in theirentireties.

FIELD OF THE INVENTION

The present invention relates generally to automatic pet feeders and,more specifically, to pet feeding systems and methods that automaticallyproject pet food in response to a triggering action by a pet.

BACKGROUND

Many pet owners feed their pets my merely placing food in a containerwithin reach of the pet. For a pet left unattended for hours at a time,it is not uncommon for food merely left in a container to not be fullyconsumed.

SUMMARY

According to the present invention, methods and apparatus are providedfor feeding a pet in a manner that engages the pet and providesstimulation and exercise. Exemplary apparatus for dispensing animal foodinclude a food hopper for containing animal food operatively connectedto a food handler that launches a portion or ration of the animal foodaway from the unit in response to detecting a triggering action of theanimal.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a schematic illustration of an exemplary embodiment of anapparatus for dispensing animal food;

FIG. 2 is a schematic illustration of another exemplary embodiment of anapparatus for dispensing animal food;

FIG. 3 is a schematic illustration of another exemplary embodiment of anapparatus for dispensing animal food;

FIG. 4 is a schematic illustration of another exemplary embodiment of anapparatus for dispensing animal food;

FIG. 5 is a schematic illustration of another exemplary embodiment of anapparatus for dispensing animal food;

FIG. 6 is a schematic illustration of another exemplary embodiment of anapparatus for dispensing animal food;

FIG. 7A is a perspective view of an exemplary embodiment of an apparatusfor dispensing animal food;

FIG. 7B is a perspective view of the apparatus of FIG. 7A showing anopposite side of the apparatus;

FIG. 7C is an exploded perspective view of the apparatus of FIG. 7A withcover components separated from a remainder of the apparatus;

FIG. 8 is a perspective view of a housing of the apparatus of FIG. 7A;

FIG. 9A is an exploded perspective view of parts that form a foodhandler of the apparatus of FIG. 7A;

FIG. 9B is an exploded perspective view of parts that form a foodportioner of the apparatus of FIG. 7A;

FIG. 9C is a perspective view that illustrates parts that form a fooddetector of the apparatus of FIG. 7A;

FIG. 9D is a perspective view that illustrates parts of a food portionerand a food detector of the apparatus of FIG. 7A;

FIG. 10A is a perspective view of parts of the apparatus of FIG. 7A,where the parts are in a home position;

FIG. 10B is a perspective view of parts of a food handler, a foodportioner, and a food detector where the parts are in a home position;

FIG. 10C is a perspective view of parts of a food handler, a foodportioner, and a food detector where the parts are in a home position;

FIG. 10D is a perspective view of parts of a food handler, a foodportioner, and a food detector where the parts are in a home position;

FIG. 10E is a perspective view of parts of a food handler, a foodportioner, and a food detector where the parts are in a home position;

FIG. 10F is a perspective view of parts of a food handler, a foodportioner, and a food detector where the parts are in a home position;

FIG. 10G is a perspective view an underside of parts of a food handlerand a food portioner where the parts are in a home position;

FIG. 11A is a perspective view of parts of the apparatus of FIG. 7A,where a cam and drive ring that control the parts are rotated 90 degreesfrom the home position;

FIG. 11B is a perspective view of parts of a food handler, a foodportioner, and a food detector where a cam and drive ring that controlthe parts are rotated 90 degrees from the home position;

FIG. 11C is a perspective view of parts of a food handler, a foodportioner, and a food detector where a cam and drive ring that controlthe parts are rotated 90 degrees from the home position;

FIG. 11D is a perspective view of parts of a food handler, a foodportioner, and a food detector where a cam and drive ring that controlthe parts are rotated 90 degrees from the home position;

FIG. 11E is a perspective view of parts of a food handler, a foodportioner, and a food detector where a cam and drive ring that controlthe parts are rotated 90 degrees from the home position;

FIG. 11F is a perspective view of parts of a food handler, a foodportioner, and a food detector where a cam and drive ring that controlthe parts are rotated 90 degrees from the home position;

FIG. 11G is a perspective view an underside of parts of a food handlerand a food portioner where a cam and drive ring that control the partsare rotated 90 degrees from the home position;

FIG. 12A is a perspective view of parts of the apparatus of FIG. 7A,where a cam and drive ring that control the parts are rotated 180degrees from the home position;

FIG. 12B is a perspective view of parts of a food handler, a foodportioner, and a food detector where a cam and drive ring that controlthe parts are rotated 180 degrees from the home position;

FIG. 12C is a perspective view of parts of a food handler, a foodportioner, and a food detector where a cam and drive ring that controlthe parts are rotated 180 degrees from the home position;

FIG. 12D is a perspective view of parts of a food handler, a foodportioner, and a food detector where a cam and drive ring that controlthe parts are rotated 180 degrees from the home position;

FIG. 12E is a perspective view of parts of a food handler, a foodportioner, and a food detector where a cam and drive ring that controlthe parts are rotated 180 degrees from the home position;

FIG. 12F is a perspective view of parts of a food handler, a foodportioner, and a food detector where a cam and drive ring that controlthe parts are rotated 180 degrees from the home position;

FIG. 12G is a perspective view an underside of parts of a food handlerand a food portioner where a cam and drive ring that control the partsare rotated 180 degrees from the home position;

FIG. 13A is a perspective view of parts of the apparatus of FIG. 7A,where a cam and drive ring that control the parts are rotated 180degrees from the home position;

FIG. 13B is a perspective view of parts of a food handler, a foodportioner, and a food detector where a cam and drive ring that controlthe parts are rotated 180 degrees from the home position;

FIG. 13C is a perspective view of parts of a food handler, a foodportioner, and a food detector where a cam and drive ring that controlthe parts are rotated 180 degrees from the home position;

FIG. 13D is a perspective view of parts of a food handler, a foodportioner, and a food detector where a cam and drive ring that controlthe parts are rotated 180 degrees from the home position;

FIG. 13E is a perspective view of parts of a food handler, a foodportioner, and a food detector where a cam and drive ring that controlthe parts are rotated 180 degrees from the home position;

FIG. 13F is a perspective view of parts of a food handler, a foodportioner, and a food detector where a cam and drive ring that controlthe parts are rotated 180 degrees from the home position; and

FIG. 13G is a perspective view an underside of parts of a food handlerand a food portioner where a cam and drive ring that control the partsare rotated 180 degrees from the home position.

DESCRIPTION

Systems and methods for automatic pet feeding are presented. Exemplaryapparatus and methods automatically project pet food pieces or portionsin response to a triggering action by a pet.

Referring to FIG. 1, an exemplary apparatus 100 comprises a food hopper104, a food handler 108, a control unit 112, and an animal sensor 116.The animal sensor 116 is configured to detect a triggering action of ananimal other than a human. The food hopper 104 is configured to containa supply of animal food. The food handler 108 is operatively connectedto the food hopper 104. The control unit 112 is operatively connected toat least the animal sensor 116 and the food handler 108. When the animalperforms the triggering action, the control unit 112 provides a signalto the food handler 108 as indicated by arrow 110. The signal 110 causesthe food handler 108 to launch a portion 114 of the animal food awayfrom the animal as indicated by dashed line 118. In an exemplaryembodiment, the food portion 114 is launched in at least a horizontaldirection away from the animal in response to the signal 110 from theanimal sensor 116 that indicates detection of the triggering action. Theportion 114 may be launched in a substantially horizontal direction(i.e. less than 45° from a horizontal plane), or the horizontaldirection.

The animal sensor 116 may be configured to sense a wide variety ofdifferent triggering actions. Any one or more actions that a pet, suchas a dog, cat, etc., can be trained to perform can be sensed by theanimal sensor. Examples of triggering actions that can be sensed by theanimal sensor include, but are not limited to, placing the pets snout inan opening, pawing at the apparatus or touching the apparatus, lickingthe apparatus, making a noise at the apparatus, such as “barking” or“meowing” at the apparatus, etc. In an exemplary embodiment, the animalsensor 116 or triggering arrangement is configured such that only awillful or intentional action by the animal to trigger the apparatuswill in fact trigger the apparatus. That is, the triggering arrangementmay be configured not to be activated by the mere presence of theanimal. Rather, the triggering arrangement is configured to activatewhen some affirmative and/or learned intentional action is performed bythe animal.

The animal sensor 116 can be any arrangement of one or more sensors thatare configured to facilitate detection of the triggering action by thepet. Examples of sensors that may be used, include, but are not limitedto, switches, touch plate type sensors, beam type sensor, any electricsensor, any optical sensor, any mechanical sensor, etc.

The food handler 108 may take a wide variety of different forms. Anyarrangement capable of launching the portion 114 of the animal food awayfrom the animal may be used. For example, the food handler 108 maycomprise any type of actuator that moves from a first or “home” positionto a second or “launch” position, where movement from the home positionto the launch position causes a portion of food to be launched orpropelled away from the food handler 108. The food handler may comprisean electromechanical device that launches a portion of food. The foodhandler 108 preferably launches the pet food a minimum of several feetaway from the unit, e.g., at least five feet or at least ten feet fromthe unit, to provide some activity as the pet chases the launched petfood (as compared with merely dropping the food). A few examples of foodhandlers 108 capable of launching the food portions 114 include (a) amotor-driven paddle controlled by the control unit 112, (b) a motordriven “whip” (i.e., a motor-driven flexible piece of material)controlled by the control unit, (c) a spring-driven paddle in which thespring is tensioned (e.g., by an electric motor or manually by the user)and the paddle is released to strike and launch the food (e.g., releasedby a motor-driven release and/or released by an actuator under controlof the control unit), (d) a spring-driven “whip” (i.e., a spring-drivenflexible piece of material) in which the spring is tensioned (e.g., byan electric motor or manually by the user) and the whip is released tostrike and launch the food (e.g., released by a motor-driven releaseand/or released by an actuator under control of the control unit), etc.

The control unit 112 can take a wide variety of different forms. Thecontrol unit 112 may be an electrical controller, such as amicrocontroller and/or a circuit board with discrete components, in oneembodiment. In another embodiment, the control unit 112 may be a seriesof mechanical linkages that transfers motion applied by the animal tothe sensor 116 to the food handler 108. Any arrangement thatcommunicates the triggering action from the animal sensor 112 to thefood handler 108 can be used.

When an electrical controller is used, various control schemes may beimplemented. For example, the controller may be configured to determinethe amount of distance the animal has covered by pursuing the foodportions and prevent operation of the apparatus for a period of time(i.e. provide a break) after a predetermined distance has been spannedby the animal to avoid overexertion of the animal. Further, the controlunit 112 may cause the food handler 108 to launch one portion 114 of petfood responsive to one triggering action, the control unit may cause thefood handler to launch a predetermined number of pet food portionsresponsive to one triggering action (either simultaneously or withpredetermined pauses between each launch), control unit may cause thefood handler to launch a random number of pet food portions responsiveto one triggering action, the control unit may cause the food handler tolaunch a selectable number of pet food portions responsive to onetriggering action, etc. Any one or more control scheme may beimplemented. In one embodiment, the controller 112 has a user input thatallows the owner to select one or more pre-programmed control schemesand/or allow the owner to create an individualized control scheme forthe pet.

The controller 112 may also be configured to control the amount ofexercise performed by the animal. For example, the controller maycontrol the apparatus to control the distance the animal runs or walksto retrieve its food. This distance may be controlled, such that theanimal gets enough exercise, but is not overexerted. This can beaccomplished in a variety of different ways. For example, the controllermay be set to launch a predetermined number of portions a significantdistance away from the apparatus 100. And then, after the appropriateexercise has been performed or distance has been traveled by the animal,the controller may cause the remainder of the animal's food to belaunched a shorter distance or provided just outside apparatus. Anotherway the distance or exercise can be controlled is by controlling thesize of the portions. The controller may set the portion size that islaunched by the apparatus based on the desired amount of exercise ordistance to be traveled by the animal. For example, a user may input adesired distance that the animal should travel for the feeding. Thecontroller can determine the number of launches that correspond to thisdistance. Then the controller may control the apparatus to divide theanimals food into this number of launches or the controller may controlthe apparatus perform the determined number of launches and then depositthe remainder of the animals meal near the apparatus.

The apparatus 100 may be a stand-alone unit. In the alternative,exemplary systems may have other components in addition to thecomponents described with respect to FIG. 1, or the components of theapparatus illustrated by FIG. 1 may be discrete and spaced apart,depending on the particular application of the apparatus.

FIG. 2 illustrates another embodiment of and apparatus 200 forautomatically projecting pet food pieces in response to a triggeringaction by a pet. The illustrated apparatus 200 includes all of thecomponents of the apparatus 100 and further comprises a food portioner202. The food portioner 202 is arranged to receive the animal food fromthe food hopper 104 and automatically portions or rations the food andtransfers the portions to the food handler 108. The food portioner 202may take a wide variety of different forms. Any arrangement that dividesthe food from the hopper 104 into portions or rations and transfers theportions or rations from the hopper 104 to the food handler may be used.Examples of food portioners 202 include, but are not limited to, (a) amotor-driven separator that lifts one or more pieces of food to belaunched by the food handler, (b) a solenoid that strikes food piecesfrom below to cause them to lift over a barrier and to the food handler,with the barrier preventing the remaining food from entering thehandler, (c) separators that separate food pieces from beneath by usinga covered, opening that is controlled to drop a portion of food throughthe opening (such as those found in so-called bubble gum machines), etc.

FIG. 3 illustrates another embodiment of an apparatus 300 forautomatically projecting pet food pieces in response to a triggeringaction by a pet. The illustrated apparatus 300 includes all of thecomponents of the apparatus 200 and further comprises a food detector302. The food detector 302 is operatively connected to the foodportioner 202 and/or the food handler 108 to detect that one or moreportions of food have been successfully transferred by the foodportioner to the food handler. A food detector may also be included todetect an amount of food remaining in the hopper 104 and/or to detectwhether food is remaining in the hopper. The food detector 302 may takea wide variety of different forms. Any sensor capable of detecting thepresence of a food portion may be used. For example, the food detectormay be a pressure sensor, a switch, an optical sensor, etc. The fooddetector 302 may be arranged to confirming that a food portion isavailable to be launched (or has been launched). Examples of fooddetectors 302 include, but are not limited to, (a) an sensor (such as anLED and detector pair or a touch sensor) in circuit communication withthe control unit and/or a physical structure that permits or prevents acertain movement (such as actuation of the food launcher) unless a pieceof food is contacted by the structure. The food detector(s) can bepositioned in any of a number of locations, e.g., positioned to detectthat a portion of food is in a desired position, such as in a pre-launchposition, or a ready-to-launch position, or positioned to detect that aportion of food has passed through a desired conduit, such as aninternal conduit (e.g., confirming that a food portion has passed fromone stage to another) or a conduit leading outside the unit (e.g.,confirming that a food portion has been projected out an opening tooutside the unit).

In an exemplary embodiment, the control unit 112, the food detector 302,food portioner 202 and/or the food handler 108 cooperate to ensure thata portion 114 of animal food is launched in response to detection of atriggering action of the animal. The control unit 112, the food detector302, food portioner 202 and/or the food handler 108 perform thefollowing functions: (1) separate a portion of food provided by thehopper, (2) confirm that a food portion is available to be launched (orhas been launched), and (3) launch the portion of food. In addition, thefood handler 108 and/or the food portioner 202 may also perform thefunction of agitating the bulk pellet supply provided by the hopper toassure steady flow of food pieces to a food separator or food launcher.Although a food detector 302 is optional, and in embodiments without thefood detector the confirmation function is not performed, this is notpreferred because of the potential of various undesirable effects on thepet—such as frustration and perhaps detraining—when the pet properlyactuates the unit and no food is launched in response thereto.

FIG. 4 illustrates another embodiment of an apparatus 400 forautomatically projecting pet food pieces in response to a triggeringaction by a pet. The illustrated apparatus 400 includes all of thecomponents of the apparatus 300 and further comprises a food portionavailability signaling arrangement 402. The food portion availabilitysignaling arrangement 402 provides an indication to the animal that afood portion is available for launching by the food handler 108. Thefood portion availability signaling arrangement 402 may take a widevariety of different forms. For example, the food portion availabilitysignaling arrangement 402 may comprise a sound producing device, a lightor image emitting device, and/or a control unit may operate one or moreof the components of the device to cause a sound (for example a stirringof the food sound) and/or a scent to be emitted (opening a vent or doorof the device that is in communication with the food) and/or that causesthe device to move or vibrate. The signal provided may be any signalthat is detectable by the animal using the device. In one embodiment,the signal is detectable by the animal and is not detectable (or noteasily detected) by humans.

The apparatus 400 for projecting pet food portions may be configured toattract the animal to the sensor 116 to eliminate or reduce training ofthe animal. Exemplary embodiments may use any one or a combination ofany two or more of the following to attract the animal to theswitch/sensor without any intervention from a human: having food scentemanate from or proximate the location of the switch/sensor, presentingattracting sounds via a speaker (such as scratching sounds generated bythe control unit and played via a speaker) proximate the switch/sensor,producing a glint of light visible proximate the switch/sensor (e.g.,generating light around the edges of the switch/sensor), and/orotherwise luring the animal to the switch/sensor (e.g., by exploitingthe animal's natural reactions to any one or more of sight, sound,and/or scent, etc. to attract the animal to the switch/sensor). In thealternative, or in addition thereto, ordinary training methods may beused to train the animal to actuate the trigger for self-feeding.

FIGS. 5 and 6 illustrate embodiments of apparatus 500 and 600 thatinclude communication circuits 124 in communication with a control unit112. The apparatus 500 and 600 may be constructed in accordance with anyone or more of the embodiments described in this application with theaddition of the communications circuit 124. The control unit 112 may bea processor (e.g., a microcontroller with integral memory) preprogrammedto perform any one or more of the functions described herein or a simpleelectronic state machine (e.g., a plurality of flip-flops or otherbi-stable circuit elements) configured to perform any one or more of thefunctions described herein. The control unit 112 may be preprogrammed togather and store in memory any combination or permutation of variousdata pertaining to the use of the unit by the pet. The communicationscircuit 124 may be any one or more wired or wireless controllers,implementing any of the well known serial and/or parallel communicationsprotocols, such as Bluetooth, Wi-Fi, USB, USB 2, FireWire, etc. forcommunication with another computer system 130, such as a remotecomputer system. The control unit 112 may be preprogrammed to downloaddata about use of the unit stored in the memory (e.g., duration andfrequency of usage by the pet) to the other computer 130 via thecommunications circuit 124. The other computer system 130 may beprogrammed to analyze and/or display data about use of the unitdownloaded from the pet feeder.

As shown in FIG. 6, an exemplary system 600 may comprise such a unithaving a modified control unit 112 that is controllable via the Internet602, with a user being able to manually trigger the food handler 108 tolaunch a portion of food via a command transmitted over the Internet viaa user interface at a remote computer 332. Additionally, or in thealternative, the system 600 can be configured to permit the user tomodify system parameters in the control unit 112, e.g., the number offood portions launched per triggering action, over the Internet 602 viaa user interface at a remote computer 332. The control unit 112 or alocal computer 330 may have any one or more of the following to permit auser to interact with a pet in connection with the unit 600 via a remotecomputer, e.g., over the Internet 602: a speaker 604 proximate and/orintegral with the unit to transmit sounds from the user to the pet, amicrophone 606 proximate and/or integral with the unit to transmitsounds from the pet to the user, a camera 608 proximate and/or integralwith the unit to transmit still images of the pet to the user, and/or avideo camera 610 proximate and/or integral with the unit to transmitvideo images of the pet to the user.

One uses the apparatus for projecting pet food portions by adding foodto the hopper 104 (e.g., the pet's daily allotment of food or half ofthe pet's daily allotment of food or some other amount of food) andactivating the apparatus (e.g. via the control unit 112). The hopper maybe sized to hold virtually any suitable amount of food, such as enoughfood for one day or enough food for multiple days or even weeks.Regardless of the amount of food held by the hopper 104, the unit may beconfigured to require actuation for each feeding or may be configured toautomatically activate at preset times or periodically. Portions of foodprovided to the animal are controlled by the number of cycles, etc. Asan example, the hopper may be sized to hold roughly a week's food supplyfor a large (˜100-pound) dog. In the alternative, the unit need not havean attached hopper, and a portion of the unit may be configured toaccept a separate hopper or be coupled to a separate hopper, such as ahopper consisting of or comprising a prepackaged, disposable foodcontainer. For example, the hopper may consist of or comprise acardboard food container, and the user may cut an opening in a surfaceof the container and position the cut opening in the hopper over theunit, which unit holds the food container and accepts food from theseparate hopper to be launched by the food handler 108.

FIGS. 7A-13G illustrate an exemplary embodiment of an apparatus 700 thatautomatically project pet food pieces or portions 114 in response to atriggering action by a pet. Any combination or sub-combination offeatures of the embodiments of FIGS. 1-6 may be included in theapparatus 700 and/or any combination or sub-combination of features ofthe apparatus 700 may be included in any of the embodiments of FIGS.1-6.

The illustrated apparatus 700 includes a food hopper 704 see FIGS.7A-7C), a food portioner 802 (see FIGS. 9B and 10B), food detector 902(see FIG. 9C), a food handler 708 (see FIG. 9A), a control unit 712(illustrated schematically in FIGS. 7A and 7B), and an animal sensor 716(see FIG. 7A). In the example illustrated by FIGS. 7A-13G the foodhopper 704, the food portioner 802, the food detector 902, and/or thefood handler 708 include common or integrated parts to reduce the totalnumber of parts that make up the apparatus 700. As such, in thefollowing description, some parts are referred to as being included inmore than one of the food hopper 704, the food portioner 802, the fooddetector 902, and/or the food handler 708.

Referring to FIGS. 7A-7C, the food hopper 704 comprises a circular, bowlshaped housing 750, a cover 752 disposed on the housing, and a lid 754disposed on the cover. Referring to FIG. 8, the bowl shaped housing 750has sloped internal surfaces 850. The sloped surfaces 850 slope toward afood portioner opening 852 as indicated by arrows 854. As such, foodpellets placed in the bowl shaped housing 750 tend to slide or roll intothe food portioner opening 852 under the force of gravity. The bowlshaped housing 750 may also be provided with a mechanism for vibratingthe bowl shaped housing to encourage movement of the food pellets to thefood portioner opening 852.

Referring to FIGS. 7A and 7B, the animal sensor 716 is positioned on oneside of the bowl shaped housing 750 (see FIG. 7A) and a food outlet 760is positioned on an opposite side of the housing (see FIG. 7B). In theembodiment illustrated by FIG. 7A, the animal sensor 716 is a switchhaving an actuator that is sized to engage the snout of an animal, butany configuration of animal sensor may be employed. The food outlet 760is sized to allow a portion, such as 1-6 animal food (i.e. cat or dogfood) pellets, to exit the bowl shaped housing 750.

FIG. 9A is an exploded perspective view of the parts that form the foodhandler 708. The parts include a base or track 920, a paddle 922, atorsion spring 924, a drive ring 926, a pivoting drive arm 928, acoupling member 930, and a motor 932. The base or track 920 includes acircular portion 934 and an outlet chute 936. The circular portion 934includes a wall 938 with an elevated drive portion 940 and a relativelyshorter release portion 942. The outlet chute 936 also includes walls944 for guiding the pellet(s) out of the apparatus 700. The paddle 922includes a circular inner portion 946 and generally rectangular outerportion 948. A notch 950 is defined in the outer portion 948. The paddle922 is rotatably connected to the track 920. The torsion spring 924 isconnected to the paddle 922 and to the track 920 to bias the paddle 922to a home position (see FIGS. 10F and 10G). A stop 951 sets the homeposition by engaging the rectangular portion 948. A sensor 952, such asa switch, may be positioned on the track 920 to detect whether thepaddle 922 at the home position. (See FIGS. 10G and 10F).

The illustrated drive ring 926 is integrally formed with or fixed forrotation with an annular cam 954. The drive ring 926 is rotatablyconnected to the track 920, concentrically with the paddle 922. Themotor 932 is coupled to the drive ring 926 by the coupler 930. The motor932 rotates the drive ring 926 in the direction indicated by arrow 956.The drive ring 926 includes a pivot hole 958.

The illustrated pivoting drive arm 928 includes a follower portion 960,a pivot post 962 that extends from one side of the follower portion, anda drive post 964 that extends from the other side of the followerportion. The pivot post is rotatably connected to the pivot hole 958 ofthe drive ring 926. When the follower portion is disposed along theelevated drive portion 940 of the wall 938, the drive post 964 is forcedradially inward of the notch 950 of the paddle 922, such that the drivepost 964 drives the paddle 922 (see FIGS. 10F, 10G, 11F, 11G, 12F and12G). When the follower portion is disposed along the shorter releaseportion 942 of the wall 938, the drive post 964 is allowed to moveradially outward of the notch 950 of the paddle 922, such that the drivepost 964 disengages the paddle 922 (see FIGS. 13F and 13G). As such, thedrive arm 928 drives the paddle 922 to compress the torsion spring 924,as the drive arm is moved from the home position along elevated driveportion 940 of the wall 938. When the drive arm 928 reaches the shorterrelease portion 942 of the wall 938, drive arm disengages the paddle 922and the torsion spring 924 quickly returns the paddle 922 to the homeposition as indicated by arrows 967 in FIG. 13F.

FIG. 9B is an exploded perspective view of the moving parts that formthe food portioner 802. The food portioner 802 comprises the annular cam954 and coupled drive ring 926, a follower 970, an a flipper 972. Theannular cam 954 includes a continuous undulating groove 974 a. Thefollower 970 includes arm 974, a pin 976 at one end of the arm, and apivot bracket 978 at the other end of the arm. The pin 976 is sized tofit in the undulating groove 974 of the annular cam 954. The pivotbracket 978 is sized to fit in the food portioner opening 852 (see FIGS.10A and 11A). The track 920 includes a barrier wall portion 980 (SeeFIG. 10 B). The food portioner opening 852 and the barrier wall portion980 act as a guide for the pivot bracket 978, such that the pivotbracket is moveable between a lower position (see FIGS. 10A and 10B) anda raised position (see FIGS. 11A and 11B). The pin 976 follows thegroove 974 a to move the follower up and down between the lower andraised positions. As such, the undulating groove 974 a defines the upand down motion of the follower.

The flipper 972 includes a pair of pivot protrusions 982, a foodengagement portion 984 extending from one side of the food engagementprotrusions, and a pivot arm 986 extending from the other side of pivotprotrusions. A drive post 988 extends from the pivot arm 986. The pairof pivot protrusions 982 are disposed in holes 990 in the pivot bracket978 to pivotally connect the flipper 972 to the pivot bracket. A surfaceof the housing 750 is positioned on or just above the drive post 988.When the pivot bracket 978 is moved from the lower position (see FIGS.10A and 10B) to the raised position (see FIGS. 11A and 11B), the drivepost 988 engages the housing 750, which causes the flipper 972 to pivot.

Referring to FIG. 10A, the follower 970 is in the lower position, thefood in the bowl shaped housing 750 slides down the sloped internalsurfaces 850 and onto the pivot bracket 978 and flipper 972. Referringto FIGS. 11A and 11B, when the follower 970 is moved to the raisedposition, the pivot bracket 978 moves up and the flipper 972 pivots,such that the food engagement portion 984 flips a food portion 114 (forexample 1-6 pellets of pet food) over the barrier wall portion 980 ofthe track 920. Referring to FIG. 11B. the food portion lands on thedrive ring 926. The general position of the food portion with respect tothe track 920 is maintained by the food detector 902 as will bedescribed in more detail below. If a food detector 902 is not included,the general position of the food portion with respect to the track 920can be maintained by a fixed wall in the position of the food detector.

The drive ring 926 includes a cutout 984. The food portion will remainon the drive ring 926, until the drive ring 926 rotates such that thecutout 984 moves below the food portion (see FIG. 12E). When the cutout984 is below the food portion, the food portion falls into the track920. When the paddle 922 is released, the paddle 922 engages the foodportion in the track 920 to propel the food portion along the chute 936,and out the food outlet 760. Since the food portioner 802 and the foodhandler are both driven by the motor 932 and the same annular cam 954,their relative movements are automatically coordinated.

FIG. 9C is a perspective view that illustrates the parts that form thefood detector 902 and the positioning of the food detector with respectto the annular cam 954 and drive ring 926. The illustrated food detector902 comprises an engagement member 1000, a biasing member 1002, such asa spring, that biases the engagement member 1000 toward the drive ring926, and a sensor 1004, such as a switch, positioned to detect theposition of the engagement member. Referring to FIGS. 10B and 11B, theengagement member 1000 is configured to be moved upward by upwardmovement of the follower 970 against the biasing force of the spring1002. As such, as long as there is nothing between the engagement member1000 and the drive ring 926, the engagement member 1000 will follow themotion of the follower 970. However, when the follower is moved to theraised position (see FIG. 11B), a food particle 114 will be moved ontothe drive ring as described above. In the raised position, theengagement member 1000 is spaced apart from the drive ring 926 androtation of the drive ring places the food portion beneath theengagement member (see FIG. 9C). When the food portion is beneath theengagement member 1000, the engagement member will remain in an elevatedposition, when the follower 970 returns to the lower position. Theengagement member 1000 tends to maintain the position of the foodportion, as the drive ring 926 slides underneath the food portion. Thesensor 1004 and/or the control unit 712 are is configured to detect thatthe engagement member is in the raised position while the follower is inthe lowered position, which is an indication that a food portion hasbeen successfully transferred from the food hopper 704 to the foodhandler 708.

Operation of the Apparatus 700

The apparatus 700 is activated by the animal touching or otherwiseactivating the animal sensor 716 (FIG. 7A) to initiate a cycle. FIGS.10A-10G illustrate the components of the apparatus 700 in a homeposition. Typically, components of the apparatus 700 will be at the homeposition at the time the animal sensor 716 is activated. Referring toFIG. 10A, at the home position, the follower 970 and flipper 972 are atthe lowest point. The pivot bracket 978 and the flipper 972 are alignedwith or below the bottom of the sloped internal surfaces 850, such thata food portion 114 (for example 1-6 food pellets) fall onto the flipper972 under the force of gravity. Referring to FIG. 10C, the pin 976 ofthe follower 970 is disposed in the bottom-most portion of theundulating groove 974, just before an inclined portion 975 of theundulating groove begins. The arm 974 may be disposed on, or just above,the drive ring 926. Referring to FIG. 10E, the engagement member 1000 ofthe food detector will also be biased to the lowest position, assumingno food is disposed between the engagement member 100 and the drive ring926. Referring to FIG. 10G, the sensor 952 detects that the paddle 922is at the home position. The sensing can be processed by the controllerto verify that the food handler 908 is not jammed. Referring to FIGS.10F and 10G, at the home position, the torsion spring 924 is notcompressed. The pivoting drive arm 928 may not yet engage the track 920or may just start to engage the track. The drive post 964 may be spacedapart from the paddle 922, or may just start to touch the paddle.

FIGS. 11A-11G illustrate the components of the apparatus 700 in aposition where the drive ring 926 and cam 954 have been rotatedclockwise 90 degrees from the home position (counter-clockwise in FIG.11G). Referring to FIGS. 11A and 11B, at this position, the follower 970and flipper 972 are at or near their highest points. The flipper 972 hasmoved the portion 114 over the barrier 980 and onto the drive ring 926.The follower 970 is holding the engagement member 1000 of the fooddetector 902 in an elevated position. The drive ring is moving the foodportion beneath the engagement member 1000. Referring to FIGS. 11F and11G, at the same time, the drive post 964 is in engagement with thepaddle 922 and moves the paddle to compress the torsion spring 924. Thismay be approximately ⅓ of the stroke of the spring.

FIGS. 12A-12G illustrate the components of the apparatus 700 in aposition where the drive ring 926 and cam 954 have been rotatedclockwise 180 degrees from the home position (counter-clockwise in FIG.12G). Referring to FIGS. 12A and 12B, at this position, the follower 970and flipper 972 have returned to the lowest point. Referring to FIG.12E, the engagement member 1000 has been biased into engagement with thefood portion to capture the food portion 114 between the engagementmember and the drive ring 926. The engagement member 1000 is separatedfrom the follower 970. The sensor 1004 is activated, indicating thatfood portion has been fed successfully and is ready to be fired orlaunched. In an exemplary embodiment, if the sensor 1004 did not detectsuccessful feeding of the food portion, the control unit 712 wouldinitiate additional cycles until either a food portion was fed, a faultwas detected and/or an empty food hopper 704 is detected. Referring toFIGS. 12F and 12G, the drive post 964 remains in engagement with thepaddle 922 and continues to move the paddle to continue to compress thetorsion spring 924. This may be approximately ⅔ of the stroke of thespring. Referring to FIG. 12E, the food portion 114 is about to fallthrough the cutout 984 of the drive ring 926. When the food portionfalls through the cutout 984, the food portion will fall on to the track920 where it will come to rest. The food portion will be in the path oftravel of the paddle 922. Upon release, the paddle 922 will impact thefood portion and drive the food portion out the food outlet 760 (FIG.7B).

FIGS. 13A-13G illustrate the components of the apparatus 700 in aposition where the drive ring 926 and cam 954 have been rotatedclockwise 270 degrees from the home position (counter-clockwise in FIG.13G). At this position, the follower 970, the flipper 972, and theengagement member 100 of the food detector 902 have all returned to thelowest point. Referring to FIG. 13F, the pivoting drive arm 928 hasreached the shorter release portion 942 of the track wall 938, allowingthe pivoting drive arm to pivot outward. As a result, the drive post 964pivots into the notch 950 to release the paddle 922. The torsion spring924 accelerates the paddle 922. The paddle 922 impact the food portionto drive the food portion out the food outlet 760.

Referring again to FIGS. 10A-10G the components of the apparatus 700return to the home position and the cycle may begin again, depending onwhether the controller indicates that additional portions should bedispensed or if it was detected that a portion was not dispensed.Referring to FIG. 10F, the paddle 922 returns to the home position andhits the stop 951. The shock and vibration caused by the paddle 922impacting the stop will be transmitted through the housing 750 anagitates the supply of food, to ensure that food is continuouslyprovided to the pivot bracket 978 and the flipper 972. The combinedeffect of the agitation, the sloped surfaces of the bowl, and a slightlyrecessed position of the flipper with respect to the bowl may assurethat the apparatus empties completely without the need for emptyingremaining food pellets.

In an exemplary embodiment, the apparatus 700 ejects small portions ofdry pet food pellets (approximately 1-6 pellets depending on size) onthe ground or within a plastic channel at moderate speed (e.g., 10ft/sec) in response to an animal activating the animal sensor 716. Thepellet(s) roll and bounce along the ground/channel in a manner thatsimulates fleeing prey. This action stimulates animals with a suitableprey drive, such as dogs and cats, to pursue the pellet(s) and eat it.The sound of the pellet within the channel can amplify this effect.

An animal may activate the apparatus 700 by touching the animal sensor716, such as a paddle switch, with its nose or paw. This is repeatednumerous times over the course of hours with periodic breaks included toavoid overexertion. A preset ration of food is delivered, therebycontrolling food intake. The repetitive back and forth motion from thefeeder to the pellet provides both mental stimulation as well asexercise without the need for human supervision.

The illustrated apparatus 700 performs the following four functions:

1. Separation of pellets from the layer reposed on the reservoir plate.

2. Confirmation that a pellet is available to be launched.

3. Launching of the pellet.

4. Agitation of the bulk pellet supply to assure steady flow of pellets.

All four functions will normally be performed through one revolution ofthe drive ring 926. The feeder may cycle multiple times if a pellet isnot positioned properly on the first attempt or if the user adjusts theunit for multiple pellet launches from a single switch activation.

The apparatus 700 can successfully launch a broad variety ofcommercially available food pellets. No specialized shapes orpre-orientation are required. However, range and consistency will varyin response to pellet shape.

The apparatus's 700 sequence of operation is controlled by auser-configurable microprocessor 712 and by mechanical adjustments.Dispense time, frequency, and total number of cycles are adjustable bythe owner via a microprocessor. The sensors 952 and 1004 are incommunication with the microprocessor 712.

The time required to train an animal to repeatedly self-activate thedevice may be less than 10 minutes. The switch's position, operation,and presentation, coupled with the immediacy of the reward forsuccessfully activating the switch, encourage & reward curiosity,thereby minimizing the amount of human direction during training.

The animal may be trained in a wide variety of different ways. Forexample, a food pellet can be waved in front of a cat or dog's face toget their attention, then the pellet is placed under the apparatus. Thedog or cat will typically nudge the apparatus to try to expose thepellet. If the cat or dog's nudging (or lack thereof) fails to activatethe switch, the owner could lift the feeder a little to expose thepellet. The owner can also keep the activation switch in line with thecat or dog so that when the cat or dog goes after the pellet under thefeeder, they hit the switch with their nose. It doesn't take long forthe animal to pay a more attention to the pellets coming out of theapparatus and begin actuating the apparatus on their own.

The animal can also be trained in the following manner:

1. the trainer/owner uses a user-interface (See reference numbers 130 or330 in FIG. 6 for example) to set use parameters for the feeder (selectlights/sounds and action upon animal detect);

2. the trainer/owner deposits food into the feeder hopper and activatesthe unit;

3. the trainer/owner brings the pet over to the filled and activatedunit; and

4. repeatedly, the trainer/owner:

-   -   a. by hand actuates the detector on the feeder; and then    -   b. indicates to the animal that food was dispensed (e.g., points        to the dispensed food).

Training may be accelerated by attracting the animal's attention to theactivation switch and providing an immediate reward once the activationswitch is pushed. The following features of the exemplary unit promoteand reward the animal's interest in the switch:

-   -   1. A piezoelectric speaker located behind the switch generates        periodic clicks and vibrations that are similar in duration,        frequency, and volume to a prey animal (mouse) moving about        inside the housing.    -   2. The motor may be momentarily activated and deactivated to        create vibration and noise. The main torsion spring would return        the device to the home position during deactivation and no        significant advancement of the mechanism would occur    -   3. A visible LED is mounted behind the activation switch and        flashed in concert with the speaker to simulate visible movement        of potential prey within the housing.    -   4. The activation switch is loose-fitting to allow food odors to        emanate from around the switch. The housing is splash-proof but        not sealed, so food odors will also emanate from other areas,        but the animal soon discovers that only actions around the        switch result in a reward and consequently tends to focus there.    -   5. The time between switch closure and pellet ejection may be        short, for example approximately ½ of a second. This rapid        result reinforces the animal's association between pushing the        switch and seeing the pellet eject. The short delay also        prevents the animal from moving to block the pellet's egress and        thereby defeat much of the exercise benefit.    -   6. The switch is positioned on the back of the device, in line        with the pellet path, to allow the animal to more easily        maintain sight of the pellet without blocking the exit point.        This additional visual stimulation heightens the drive to pursue        the pellet.

While the present invention has been illustrated by the description ofembodiments thereof, and while the embodiments have been described insome detail, it is not the intention of the applicant to restrict or inany way limit the scope of the appended claims to such detail.Additional advantages and modifications will readily appear to thoseskilled in the art. For example, the exemplary device in the followingpages may be modified by molding the drive components out of plastic andintegrating the functions of the catches and drive arm into a singlepiece with flexible elements as part of the molding instead of separatesprings. Additionally, the steps of methods herein may generally beperformed in any order, unless the context dictates that specific stepsbe performed in a specific order. Therefore, the invention in itsbroader aspects is not limited to the specific details, representativeapparatus and methods, and illustrative examples shown and described.Accordingly, departures may be made from such details without departingfrom the spirit or scope of the applicant's general inventive concept.

What is claimed is:
 1. An apparatus for dispensing animal food,comprising: an animal sensor for detecting a triggering action of ananimal other than a human; a food hopper for containing animal food; afood handler operatively connected to the food hopper; a food portionerarranged to receive said animal food from said food hopper andautomatically transfer portions of said food to said food handler; and acontrol unit operatively connected to at least the animal sensor and thefood handler, wherein the control unit provides a signal to the foodhandler that causes the food handler to launch a portion of the animalfood away from the unit in at least a horizontal direction in responseto a signal from the animal sensor that indicates detection of saidtriggering action.
 2. The apparatus of claim 1 further comprising a fooddetector operatively connected to the food portioner to detect that oneor more portions of food have been transferred by the food portioner tothe food handler.
 3. The apparatus of claim 2 wherein the control unit,the food detector, and the food handler cooperate to ensure that aportion of animal food is launched in response to detection of atriggering action of the animal.
 4. The unit for dispensing animal foodaccording to claim 3, wherein the animal sensor is capable of detectingat least one of the following: the animal touching the apparatus and theanimal placing it's snout in an opening of the apparatus; wherein thefood handler is capable of launching the food at least five feethorizontally away from the apparatus; wherein the control unit isconfigured to perform at least one of the following: cause the foodhandler to launch a predetermined number of animal food portionsresponsive to one triggering action, cause the food handler to launch arandom number of animal food portions responsive to one triggeringaction, and cause the food handler to launch a user-selectable number ofanimal food portions responsive to one triggering action.
 5. Theapparatus of claim 1 wherein the food handler is operable to launch saidportion of animal food away from the unit in a substantially horizontaldirection.
 6. The apparatus of claim 5, wherein the apparatus will cycleand the paddle will dry fire if a portion of the animal food is not inposition to be launched away from the apparatus to agitate the animalfood in the food hopper.
 7. The apparatus of claim 1 wherein the animalsensor is capable of detecting at least one of the following: the animaltouching the apparatus and the animal placing it's snout in an openingof the apparatus.
 8. The apparatus of claim 1 wherein the food handleris capable of launching the food at least five feet horizontally awayfrom the apparatus.
 9. The apparatus of claim 1 wherein the control unitis configured to perform at least one of the following: cause the foodhandler to launch a predetermined number of animal food portionsresponsive to one triggering action, cause the food handler to launch arandom number of animal food portions responsive to one triggeringaction, and cause the food handler to launch a user-selectable number ofanimal food portions responsive to one triggering action.
 10. Theapparatus of claim 1 further comprising a food portion availabilitysignaling arrangement that provides an indication to the animal that afood portion is available for launching by the food handler.
 11. Theapparatus of claim 10 food portion availability signaling arrangementcomprises at least one of the following: a sound producing device, alight emitting device, and a control unit output that causes said foodhandler to move.
 12. The apparatus of claim 1 further comprising amovable food detector moved by the arm, wherein a food detector sensorsenses a portion of the food detector if a portion of the animal food isnot in position to be launched away from the apparatus.
 13. A unit fordispensing animal food, comprising: an animal sensor for detecting atriggering action of an animal; a food hopper for containing animal foodoperatively connected to a food handler that launches a portion of theanimal food substantially horizontally away from the unit in response todetection of a triggering action of the animal; a food portioneroperatively connected to the food hopper for transferring a portion offood from the hopper to the food handler; a food detector operativelyconnected to the food handler to detect that a portion of food has beentransferred by the food portioner; and a control unit operativelyconnected to at least the animal sensor, the food detector, and the foodhandler; and wherein the control unit, the food detector, and the foodhandler cooperate to ensure that a portion of animal food is launched inresponse to detection of a triggering action of the animal.
 14. The unitfor dispensing animal food according to claim 13, wherein the animalsensor is capable of detecting at least one of the following: the animaltouching the unit and the animal placing it's snout in an opening of theunit.
 15. The unit for dispensing animal food according to claim 13,wherein the food handler is capable of launching the food at least fivefeet horizontally away from the unit.
 16. The unit for dispensing animalfood according to claim 13 wherein the control unit is configured toperform at least one of the following: cause the food handler to launcha predetermined number of animal food portions responsive to onetriggering action, cause the food handler to launch a random number ofanimal food portions responsive to one triggering action, and cause thefood handler to launch a user-selectable number of animal food portionsresponsive to one triggering action.
 17. The unit for dispensing animalfood according to claim 13, wherein the animal sensor is capable ofdetecting at least one of the following: the animal touching the unitand the animal placing the animal's snout in an opening of the unit;wherein the food handler is capable of launching the food at least fivefeet horizontally away from the unit; wherein the control unit isconfigured to perform at least one of the following: cause the foodhandler to launch a predetermined number of animal food portionsresponsive to one triggering action, cause the food handler to launch arandom number of animal food portions responsive to one triggeringaction, and cause the food handler to launch a user-selectable number ofanimal food portions responsive to one triggering action.
 18. Anapparatus for dispensing animal food, comprising: an animal sensor fordetecting a triggering action of an animal other than a human, whereinthe animal sensor is a switch located away from a food exit of theapparatus; a food hopper for containing animal food; a food handleroperatively connected to the food hopper, wherein the food handlercomprises an actuator operatively coupled to an arm and a paddleconnected to a spring; and a control unit operatively connected to atleast the animal sensor and the food handler; and wherein the controlunit provides a signal to the food handler that causes the food handlerto launch a portion of the animal food out of the food exit and awayfrom the apparatus in at least a horizontal direction in response to asignal from the animal sensor that indicates detection of the triggeringaction; wherein in response to the signal from the control unit, theactuator of the food handler rotates the arm in a first direction suchthat a catch of the arm engages a portion of the paddle to rotate thepaddle in the first direction from a ready position to a launchposition; wherein the spring is tensioned as the paddle is moved fromthe ready position to the launch position; wherein in the launchposition, the catch of the arm releases the paddle such that a forceprovided by the spring moves the paddle in a second direction oppositethe first direction to launch the portion of the animal food out of thefood exit and away from the apparatus.
 19. The apparatus of claim 18,wherein a bottom of the food hopper comprises a movable hopper plate,and wherein a portion of the paddle engages a portion of the hopperplate when the portion of the animal food is launched away from theapparatus to move the hopper plate and agitate the animal food containedin the food hopper.